Happy System Administrator Appreciation Day!
If you didn't know: https://en.wikipedia.org/wiki/System_Administrator_Appreciation_Day
Happy System Administrator Appreciation Day!
If you didn't know: https://en.wikipedia.org/wiki/System_Administrator_Appreciation_Day
Systemadministratoren sorgen im Verborgenen für Stabilität, Schutz und Reaktionsfähigkeit.
Am heutigen #SysAdminDay erinnern wir daran. Unsere Forschungsprogramme können sie unterstützen. Die @Cyberagentur finanziert Werkzeuge, die Admins helfen, Systeme vorausschauend abzusichern. Forschung für eine sichere digitale Infrastruktur.
Mehr zum Aktionstag: https://t1p.de/3zdp0
#Systemadministration #ITSecurity #Cyberagentur #Cyberresilienz #DigitaleSouveraenitaet #ForschungFürDieSicherheit
Linux tip: Use `systemctl --failed` to quickly identify which services failed to start after boot. Much faster than scrolling through journal logs when troubleshooting system issues. #Linux #SystemAdministration #SysAdmin
Linux tip: Set `HISTCONTROL=ignoredups:erasedups` in your init script to prevent duplicate commands cluttering your history. Clean history makes command recall much more efficient. #Linux #SystemAdministration #SysAdmin
I've been busy preparing my community course "Basic Linux System Administration" for a few weeks now. The next instructor-led cohort starts in September.
Here's the public chapter on text editing with vim. You can use it outside the course context, simply as a concise #vim tutorial.
https://courses.monospacementor.com/courses/linsys-1/mod01-fundamentals/0105-editing.html
Shell tip: `${var%suffix}` removes the shortest matching suffix. `${var%%suffix}` removes the longest. `${var#prefix}` and `${var##prefix}` work the same for prefixes. Mnemonic: # comes before % on the keyboard. #Linux #SystemAdministration #SysAdmin
Linux tip: `fuser -v /path/to/file` shows which processes have a file open. Use `-k` to kill those processes. Essential when "device busy" errors prevent unmounting filesystems. #Linux #SystemAdministration #SysAdmin
LIVE NOW!
DevOps/SRE Instructor Live Stream
On this lovely Friday, let's chat about #Linux #SystemAdministration, #SelfHosting, or any other topic in the #DevOps and #SRE space you're interested in!
Version-control every configuration change. Use git even for single files. When something breaks, you can see exactly what changed and when. Your future self will be grateful. #Linux #SystemAdministration #SysAdmin #Coding
Linux tip: `ionice -c 3 command` runs a command with idle I/O priority. It only gets disk access when no other processes need it. Perfect for backups or maintenance tasks. #Linux #SystemAdministration #SysAdmin #Performance
Linux tip: `sysctl vm.drop_caches=3` clears page cache, dentries, and inodes from memory. Useful for testing cold cache performance, but never use in production scripts. Only for debugging! #Linux @#SystemAdministration #SysAdmin
Linux tip: `pidof process_name` returns process IDs by name. Unlike `pgrep`, it matches only the command name, not arguments. Use in scripts where you need exact process name matching. #Linux #SystemAdministration #SysAdmin
Did you know FreeBSD includes a built-in utility for scheduling routine maintenance tasks?
From daily security checks to system cleanup jobs, the periodic system helps keep things running smoothly — and it’s easy to customize.
Learn how to use existing periodic scripts and integrate your own in our latest blog:
https://freebsdfoundation.org/blog/an-introduction-to-freebsds-periodic-system/
LIVE NOW!
DevOps/SRE Instructor Live Stream
On this lovely Tuesday, let's chat about #Linux #SystemAdministration, #SelfHosting, or any other topic in the #DevOps and #SRE space you're interested in!
Linux tip: `strace -e trace=file program` traces only file-related system calls. Add `-o output.txt` to save results. Reveals which config files, libraries, or data files your program actually accesses. #Linux #SystemAdministration #SysAdmin
Linux tip: `systemd-analyze blame` shows which services slow down boot time. Use `systemd-analyze critical-chain` to see the dependency chain causing delays. Optimize the real bottlenecks. #Linux #SystemAdministration #SysAdmin
Linux tip: `iostat -x 1` monitors disk I/O performance every second. Watch the `%util` column - consistently high values indicate I/O bottlenecks. Press Ctrl+C to stop monitoring. #Linux #Performance #SystemAdministration #SysAdmin
Linux tip: `ss -s` provides socket statistics summary. Shows TCP/UDP connection counts and states. Much faster than parsing full socket lists when you just need connection metrics. #Linux #SystemAdministration #SysAdmin
Powershell - Export all members of all AD Security Groups to CSV | https://techygeekshome.info/powershell-export-all-members-of-all-ad-security-groups-to-csv/?fsp_sid=2635 | #Guide #Microsoft #Powershell #Windows#PowershellScripting #ActiveDirectory #SecurityGroups #CSVExport #AutomatingTasks #DataManagement #ITProfessionals #Coding #SystemAdministration #TechSolutions
https://techygeekshome.info/powershell-export-all-members-of-all-ad-security-groups-to-csv/?fsp_sid=2635